Chess Board
[ECO code C42] Do not scroll the screen..! Move Move Move Move Here Move Here Move Here Move Here
PETROFF'S DEFENCE
White's knight under attack on K5(e5) retreated to its initial developed position, losing a tempo.
Black's king's-side Knight now recoups the earlier pawn loss by capturing White's king's pawn on K5(e4) (creating an open king's file, where Black can answer a 5.Q-K2(e2) pin by 5..Q-K2(e7).
	White	Black
 1.	P-K4	P-K4
 2.	Kt-KB3	Kt-KB3
 3.	KtxP	P-Q3
 4.	Kt-KB3	KtxP
WHITE to Move or Undo or Jump or Clear
 
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Chess Board

WHITE moves Queen's Pawn:

P-Q3 (d3) or P-Q4 (d4) ?

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